Latch and lock.



W. KRAFT.

LATCH AND LOCK.

APPLICATION FILED APR.5, 1912.

1,041,305. Patented octqw, 19i2.

' WITNESSES: IN VENTOR ATTORNE Y WILLIAM KRAFT, 0F DETROIT, MICHIGAN.

LATCH AND LOCK.

Specification of Letters Patent.

Patented Oct. 15,1912.

Applicationfiled April 5, 1912. SeriaI No. 688,611.

To all whom it may concern:

Be it known that I, W LLIAM KRAFT, a citizen of the United States,residing at Detroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvement in Latches and Locks, and declare thefollowing to be a full, clear, and exact description of the same, suchas will enable others skilled in the art to which it pertains to makeand use the same, reference being bad to the accompanying drawings,which form a part of this specification.

This invention relates to latches and locks and has for its object alatch of simple and cheap construction, which is adapted to per formboth the functions of a latch and a lock.

It is more especially designed for screen doors and doors of lightertype, although it can be used with almost any hinging member and frame.

Another important feature of this latch is that it also operates as abuffer to prevent the slamming of the door against the jamb.

In the drawings :Figure 1, is a side elevation of the device fastened toa portion of the door and a portion of the door frame. Fig. 2, is asection through the door and door frame, showing the two parts of thelatch before they engage. Fig. 3, is the same view showing the partsengaged. Fig. 4, is a detail elevation of the lock. Fig. 5, is a detailsection on the line 55 of Fig. 4.

The latch consists of two strips of tempered spring steel, the basestrip 1, to which is riveted the spring strip 2, that is bent to formtwo spring arms 3 and 4, having cylindrical terminals 5 and 6 formed bybending the ends of the spring arm back upon the arms. These cylindricalterminals tend together by reason of the resiliency in the arms 3 and 4.For the purposes of clearness, the elements described above constitutingone member will, in the aggregate, be called the clasping member. Thisclasping member is secured to the side of the door A by screws 7.

The companion member to the clasping member will, for the purposes ofclearness, be termed, the clasped member and comprises a bar of metalhaving a flattened portion, which is secured to the inside of the doorframe B by the screws 8. A portion cylindrical in cross section inclinesaway from the flat portion, as shown in Figs. 2

and 3 and its end is turned up, as shown in Fig. 1, forming the latchpiece 9, which has a beveled edge, as shown in Figs. 2 and 3. Byexamining the arrangement in Figs. 2 and 3, it is readily seen that theclasped member is positioned upon the frame so that, when the doorcloses, the terminals 5 and (3 strike the latch piece 9, one on eachside, so that the latch piece drives right through bet-ween theterminals, spreading them for entrance by reason of the resiliency inthe arms 3 and 4. The clasped member is now in engagement with theclasping member, as shown in Fig. 3 and the door is secure from openingas against ordinary disturbances, as it takes some small effort to pullthe clasped member and the clasping member apart by overcoming theresilience of the arms 3 and 4. In this connection, I provided a lockthat cooperates with the arrangement of the terminals, so that when theclasped member has interengaged with the clasping member, the terminalsare locked together so that they cannot be spread and hence the claspedmember and the clasping member cannot be separated. The form of thislook is shown in detail in Figs. 4 and 5 and comprises an invertedJ-shaped cylindrical bar 10, the stem of which is journaled in thecylindrical terminal 5 and the bill 11 of which is slotted as at 12, sothat it can fit over the edge of the arm 3, as shown in Figs. 4 and 5.This is the position that it occupies when it is not desired to lock thedoor. When it is desired, to lock the door, the lock is raised, so thatthe bill clears the arm 3 and it is then swung around and the billinserted in the opposite terminal. It is obvious that the arms are nowlocked so that the terminals cannot spread and the latch piece 9 cannotbe withdrawn from the clasping member. This latch is also a buffer as itis evident that when the latch piece 9 strikes against and between theterminals 5 and 6, that there is a give in two directions, that is, theconcave arms 3 and 4 would, to a certain extent, bufi a direct impactupon the terminals and the door is further checked by reason of thefriction of the terminals with the latch piece when the latch pieceattempts to pass through and separate the terminals resiliently tendingtogether.

That I claim is 1. A combined latch and lock, having in combination, aclasping member provided with a pair of terminals resiliently tendingtogether, a clasped member adapted to strike between the terminalsspreading them and entering the clasped member and an inverted J-shapedlock journaled in one of the terminals and adapted to be turned so as tobe inserted in the opposite terminals and thereby lock the terminalsfrom separation, substantially as described.

2. A combined latch and lock, having in combination, a clasping memberprovided With a pair of thin metal arms bent at their ends to formcylindrical terminals, a clasped member arranged to strike between theterminals, and thereby pass between the terminals resiliently tendingtogether, and

a lock comprising an inverted J-shaped bar having the end of its billslotted and thereby adapted to normally engage the edge of one of thearms, the said lock being journaled in one of the cylindrical terminalsand being adapted to be lifted from engagementwith the edge of the armand revolved so that the bill may be inserted in the 0pposite terminaland thereby lock the terminals together, substantially as described.

In testimony whereof, I sign this specification in the presence of twowitnesses.

XVILLIAM KRAFT. Witnesses STUART C. BARNEs, VIRGINIA C. SPRATT.

Copies of this patent may be obtained for five cents each, by addressingthe Uommissioner of Patents. Washington, D. C."

